Subject: Re: [biofuel] WTK: tweaks and add-ons to make *stationary* diesels
less polluting
Date: Sun, 4 Aug 2002 12:17:26 -0400
Organization: Green-trust.org
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just pick one up from a late model wreck.
Steve Spence
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----- Original Message -----
From: "Christopher Witmer" <[EMAIL PROTECTED]>
To: <biofuel@yahoogroups.com>
Sent: Sunday, August 04, 2002 4:03 AM
Subject: Re: [biofuel] WTK: tweaks and add-ons to make *stationary* diesels
less polluting
> Thanks, Todd (and Steve Spence too). I understand the point about
> skipping fossil fuels entirely. What would be the best approach to
> obtaining a good particle trap / catalytic converter solution? Would a
> catalytic converter salvaged from an automobile work? I have seen some
> HUGE catalytic converters for massive diesel gensets, but they cost more
> than I earn in a year (although they were cheap considering the scale at
> which they would be used); other than that I haven't seen any
> aftermarket converters for diesel, and besides, I'd like to do this on a
> shoestring budget . . . they market particle traps for trucks in Japan,
> but they are expen$ive as well . . . much more than I would want to pay.
> If I could get enough heat out of the exhaust, I wonder if a chamber
> equipped with an electrostatic particle arrestor similar to that used in
> certain home air purification systems would work. Or, if I went with a
> filter, would something as coarse as the air filters used on the intake
> side of the engine be any good? Perhaps subjecting the exhaust to a
> bubble wash would be a good way to get the particles out . . . Why isn't
> there an article on how to do this in "Mechanics Illustrated" magazine?
> In any case, I guess the proper order would be 1) get the heat out, 2)
> get the particles out, and 3) get the NOx out -- right?
>
> Keep those suggestions coming!
>
> Gratefully,
>
> Christopher Witmer
> Tokyo
>
> Appal Energy wrote:
>
> > Don't see why, if you are looking for "less polluting," that you
> > would contemplate used fossil fuel products as part of the fuel
> > compliment. Manditorily this would increase PAHs over biodiesel,
> > and introduce the probability of heavy metals in the emissions.
> > As well, if you go to a vegetable oil based lubricating oil
> > ("synthetic"), you reduce almost entirely any PAHs that can come
> > from crankcase oils.
> >
> > Further, the biodiesel is sulfur free, permitting the inclusion
> > of a catalytic converter to reduce NOx, where one couldn't be
> > introduced before. (You mention this below.) Particulate traps
> > can further reduce emissions, a considerably more easily applied
> > technology in situations where there are constant loads, such as
> > gensets.
> >
> > You mention exhaust heat, which can be used to reduce loads
> > elsewhere when complimented with other technologies such as such
> > as indirect heat exchange for space heating, gas absorption
> > cooling or Stirling engines.
> >
> > Personally? Were it me? I'd abandon the idea of used fossil oils
> > as a fuel compliment. Even with a turbocharger, you will not
> > achieve as high an air to fuel ratio as is needed for highly
> > efficient combustion. Best to use these fuels in something along
> > the lines of combustion in a high pressure air stream, as in a
> > boiler or space heat application for which it was designed.
> >
> > Todd Swearingen
> >
> > ----- Original Message -----
> > From: Christopher Witmer <[EMAIL PROTECTED]>
> > To: <biofuel@yahoogroups.com>
> > Sent: Saturday, August 03, 2002 7:37 PM
> > Subject: [biofuel] WTK: tweaks and add-ons to make *stationary*
> > diesels less polluting
> >
> >
> >
> >>O Fuelish Ones,
> >>
> >>I am trying to discover ways of making stationary diesels
> >>
> > (e.g.,
> >
> >>permanently installed electrical generator engines) less
> >>
> > polluting, and
> >
> >>I would greatly appreciate any suggestions, ideas, avenues to
> >>
> > pursue and
> >
> >>other tidbits of wisdom that might be useful.
> >>
> >>It stands to reason that there are a lot of things one would
> >>
> > hesitate to
> >
> >>try on an automobile, but which would't present any great
> >>
> > problems for a
> >
> >>diesel engine that was never moved around.
> >>
> >>Some possibilities that occur to me (I'm thinking out loud here
> >>
> > and
> >
> >>would appreciate other ideas as well as comments if any of
> >>
> > those listed
> >
> >>would seem to be unfruitful):
> >>
> >>* Combustion of biofuels (doh!) and (*if* they can be burned
> >>
> > cleanly
> >
> >>enough) waste petroleum based lubricating oils
> >>
> >>* Addition of water at just the right point in the cycle
> >>
> >>* Addition of methane at the air intake
> >>
> >>* Careful filtration of both lubricants and fuels
> >>
> >>* Optimum use of heat coming off the engine (also cools engine
> >>
> > better)
> >
> >>* Addition of a turbocharger
> >>
> >>* Addition of exhaust filtration/scrubbing device(s) --
> >>
> > preferably
> >
> >>buildable and maintainable by the user! -- again, bulky size
> >>
> > isn't so
> >
> >>much of an issue with the stationary engine
> >>
> >>* Addition of an exhaust catalytic converter *if* durable and
> >>
> > cheap enough!
> >
> >>Thanks,
> >>
> >>Christopher Witmer
> >>The Fuelish Acolyte
> >>Tokyo
> >>
> >>
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> >>
> >>
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> > Service.
> >
> >>
> >
> >
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> >
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>
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